Charge: An Overview of Electric Charges & Forces

AI Thread Summary
Charge refers to the fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. Electric charge exists in two types: positive and negative, which attract or repel each other based on their nature. Understanding electric charge is essential for grasping concepts in physics and mathematics related to electromagnetism. For a deeper exploration, readers are encouraged to consult general articles on the topic or ask more specific questions. This foundational knowledge is crucial for further studies in physics.
mildpiranha
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What is charge?
 
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Welcome to PF.
Since I don't know what your level of physics and mathematics is, perhaps it is best to direct you to this general article (or this one, if it was electric charge specifically you were talking about) and urge you to ask a more specific question.
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'
So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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